What is a Market Crash and How Can You Trade It?
Dec 7, 2021
A crash in financial markets can be defined as a large fall in price in a short amount of time, but this definition leaves much to be desired for those looking to trade such an opportunity. What is a large fall from a historical data perspective? How often does this occur? Should you buy or sell?
SM75 \ Small Stocks Index
Market crashes can also be defined as downside movement outside of what is deemed normal or healthy; and, thankfully, what’s normal can be loosely defined by the standard deviation.
Standard deviations summarize historical price data into simple ranges that the data has stayed inside of with varying levels of confidence. For example, SM75’s 1 standard deviation of +/-0.99 tells you that the market has historically held within that range on a daily basis 68% of the time; and the market has held within +/-1.98 95% of the time and +/-2.97 99% of the time.
So, if the 3 standard deviation range of +/-2.97 reflects that market dropping by -$3 or more less than 1% of the time, then that might be a solid definition of what’s abnormal and thus a crash.
SM75 \ Standard Deviations
Historically, stocks have tended to rise the day following downside action outside of any standard deviation, but the greatest success has come in buying the crash. That said, this is a rare opportunity that presents itself only a handful of times annually, so any movement nearing 3 standard deviations lower could suffice.
SM75 \ Standard Deviations
Crash rhetoric finds its way into news feeds and conversations seemingly more often than crashes actually occur, but taking the time to define and act on them could yield profits in the future.
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